If we did anything it likely wouldn't be a tabletop over the forum Brother Dextus. I'd be open to Renegade marines of some sort or Astartes. My buddy and I also thought about perhaps doing something incorporating the new Primaris Marines, an rp about a company from the Unnumbered Sons or something like that.
I wasn't suggesting to do it full rules set style. A general guideline - like pirate rules